Add or update list member

https://mailchimp.com/lists/{list_id}/members/{subscriber_hash}

Add or update a list member.

Access Token Required: API Key

Path Parameters

list_idstringrequired

The unique ID for the list.

subscriber_hashstringrequired

The MD5 hash of the lowercase version of the list member's email address. This endpoint also accepts a list member's email address or contact_id.

Query Params

skip_merge_validationstring

If skip_merge_validation is true, member data will be accepted without merge field values, even if the merge field is usually required. This defaults to false.

Responses

{
  "success": true,
  "data": {
    "id": "abc123",
    "created_at": "2025-01-01T00:00:00Z"
  }
}

{
  "success": false,
  "error": {
    "code": "VALIDATION_ERROR",
    "message": "Invalid request parameters"
  }
}

Language

CredentialsAPI KEY

API Key

Enter token below to save for later

cURL Request

1curl --request PUT \
2     --url 'https://mailchimp.com/lists/{list_id}/members/{subscriber_hash}' \
3     --header 'accept: application/json' \
4     --header 'content-type: application/json'

Response

1{
2  "success": true,
3  "data": {
4    "id": "abc123",
5    "created_at": "2025-01-01T00:00:00Z"
6  }
7}

PUT